crowell



(No Model.) 5 Sheets-Sheet 1.

L. C. GROWELL. STOP MECHANISM FOR WEB PRINTING MACHINES.

No. 404,959. Patented June 11, 18.89.

fiwen/Zir;

map.- V

N, PETERS, Pholv-Lilhographur, Washinginn, n c.

(No Model.) 5 Sheets-Sheet 2.

I L. O. OROWELL. STOP MECHANISM FORWEB PRINTING MACHINES.

No. 404,959. Patented June 11, 1889,

N. PETERS. Ph0|0-LilMgr1plWn Wuhinglon. D. C.

(No Model.) 5 Sheets-Sheet a.

L. O. OROWELL STOP MEGHANISM PORWEB PRINTING MACHINES.

No. 404,959. Patented June 11, 1889.

n, PETERS. PhobLilhgrlphur. Washinghm-DEC:

, (No Model.) l 5 Sheets-Sheet 4.

N L. 0. OROWELL. I

STOP MBGHANISM POE WEB PRINTING MACHINES.

No. 404,959. Patented June 11, 1889.

N. FUCHS. Phnlo-Lmwgmphcn Waikingdorl. 0.0.

5 Sheets-Sheet 5.-

(No Medal.)

L. 0. OROWELL. STOP MECHANISM FOR WEB PRINTING MAUHINES.

Patented June 11 N. PEYERS. Pholwulhognphun Washinglnn. DIG.

UNITED STATES PATENT OFFICE.

LUTHER O. OROWELL, OF BROOKLYN, ASSIGNOR TO B. HOE & 00., OF NET/V IYORK, N. Y.

STOP MECHANISM FOR WEB-PRINTING MACHINES.

SPECIFICATION forming part of Letters Patent No. 404,959, dated June 11,1889.

Serial No. 242,108. (No model.)

To all whom-it may concern.-

Be it known that I, LUTHER O. CRowELL, a citizen of the United States,residing at Brooklyn, county of Kings, and State of New York, haveinvented certain new and useful to damage the machine.

In many web-printing machines as at present organized and operated theweb passes through the printing mechanism and through agreat part of thedelivery mechanism before it is severed into sheets. During its passagethrough the machine the web usually undergoes a con siderable amount ofmanipulation. For example, it may be folded longitudinally and thentransversely before being severed into sheets it may be splitlongitudinally and its sect-ions associated; one or both of the sectionsof the Web or the whole web may be turned at right angles one or moretimes or be transferred laterally by passing over turning-bars; two webscoming from different rolls may be associated; two or more webs orsections of a Web may be pasted together; the web may be turned overbetween the printing of its opposite sides,or it may be made to undergovarious other manipulations. The particular manipulation to which theweb is subjected varies, of course, with clifferent classes of machines;but in all the more improved web-printing machines the web necessarilyundergoes considerable manipulation, and is subjected to considerablestrain, and, owing to the fact that the more improved machines areoperated at a very high rate of speed, there is always more or lessdanger that the web will become broken either from some imperfection init or from some slight imperfection in the operation of the machine, andthis, when it occurs, is liable, unless the machine is at once stopped,to cause the damp paper to wedge in among the parts of the machine insuch a way as to occasion a choke, which will cause much-trouble anddelay, and

is liable to break or otherwise damage parts of the machine. It istherefore exceedingly desirable that means should be provided by which,in case the web breaks during any part of its course through themachine, the machine will be stopped in time to prevent a choke and itsattendant damage.

The present invention is designed to accomplish this result, and to thisend I provide the devices which are employed to start and stop themachineviz., the belt-shifter or other similar device and the brake,with connections by which they can be operated from some moving part ofthe machine, and these connections include a clutch mechanism which isoperated by an electro-magnet. The term connections is therefore used todesignate the mechanism which connect the beltshifter or similar devicewith some moving part of the machine and through which the belt-shifteris operated from the machine. This magnet is located in an electriccircuit having a number of branches, which are connected withcircuit-closers located in different parts of the machine, and soarranged that so long as the web is unbroken the cir- 8o cuit throughthe magnet will remain open and the clutch mechanism will not beoperated; but whenever a break occurs in the web the circuit through themagnet will be closed, thereby energizing the magnet and operating theclutch mechanism so as to establish the connection between the machineand the stopping devices, and thus operate these and stop the machine intime to prevent a choke and its attendant trouble and damage.

The organization thus briefly outlined will now be described in detail,reference being had to the accompanying drawings, in which Figure 1 is aside elevation of the automatic stop mechanism embodying the present 9 5invention. Fig. 2 is a plan view of the same. Fig. 3 is a sectionalelevation taken on the line 3 3 of Fig. 1. Fig. 4 is a similar viewshowing the parts in a different position to illustrate the operation ofthe apparatus. I00 5is an elevation of the clutch-mechanism lookingoutward from the frame of the machine. Fig. 6 is a detail of the clutchmechanism, and Fig. 7 is a diagrammatic view illustrating theapplication of the invention to a web printing and delivery mechanism.

Referring now particularly to Figs. 1 to (i, it is to be understood thatA represents the side frame of a printing mechanism; B, the maindriving-shaft; C D, the usual fast and loose pulleys with which the mainshaft is provided; E, the brake-pulley; F, the driving-belt, and G theusual forked belt-shifter. The belt-shifter G is attached to a head 15,which is arranged to slide freely upon a bar H, projecting from theframe-work A, and is provided with a handle 10, by which the beltshiftercan be operated. The connections for operating the belt-shifter from themachine are in the case illustrated organized as follows: The head 15 isprovided with an inwardly-extending bar 20, having a rack 19, whichengages with a pinion 21, which is mounted to turn freely upon a shaft40, supported in brackets K, extending from the side frame A. Secured tothe side of the pinion 21, or made integral therewith, is a ratchet 22,which is of somewhat larger size than the pinion. The shaft 40 isprovided with a gear 39, which engages with a gear 38, mounted on a studextending from the bracket K and connected to a bevel-gear 37, which inturn engages with a similar gear 36, mounted upon a shaft which isconstantly driven from the printing-machine, so as to drive the shaft 40when the printing mechanism is in operation. The shaft 40, in additionto the loose pinion 21 and ratchet 22, is provided with a disk 35, whichis fixed to the shaft and carries a friction-band 34, inside of which isarranged a disk 33, which is loose upon the shaft. The friction-band 34is provided with an adjusting-screw 16, by which it can be tightenedonto the disk 33, so as to cause the latter to turn with the shaft 40until sufficient resistance is offered to overcome the friction of theband The disk is provided upon its face with one or more pawls 9, whichare so arranged that when they are permitted to do so they engage withthe ratchet 22, and thus impart the motion of the shaft 40 and disk 33to the ratchet and the pinion 21., and thence to the rack 13 and thebelt-shifter. The pawls 9 are provided at their ends with recesses 2,which are engaged by the hooked ends of catches 8, which are alsopivoted upon the face of the disk 33 in such manner as to normally holdthe pawls 9 out of engagement with the ratchet 22, as shown in Fig. 3.The catches 8 are provided with tail-pieces 7, which project outwardslightly and between which and the pawls are arranged springs 6, whichperform the double function of holding the catches in engagement withthe recesses 2 in the ends of the pawls and also of throwing the pawlsinto engagement with the ratchet 22 whenever they are released from thecatches.

Located at one side of the disk is a lever 5, which is pivoted upon abracket L in such position that its lower end normally lies out of thepath of the tail-pieces 7 of the catches S as they are carried around bythe disk 33 in its revolution with the shaft 40. The lever 5 is sopositioned,however, that by being rocked slightly on its pivot its lowerend will be thrown into the path of the tailpieces 7, and thus rock thecatches 8 so as to cause them to release the pawls 9 and allow thelatter to engage with the ratchet 22.

In order to prevent the lever 5 from being sprung or bent as it isstruck by the tailpieces 7,its lower end is arranged to move along theface of and be supported by a projection 4, extending from the bracketL. The upper end of the lever 5 is provided with a cross-head 12, whichforms the armature of an electro-magnet 23, which is so arranged thatwhen energized it will move the armature 12, and thus rock the lever 5so as to carry its lower end into the path of the tailpieces 7 of thecatches 8. This magnet 23 is located in the electric circuit beforereferred to, which is provided with circuit-closers so arranged thatwhenever the web breaks at any point in the printing or deliverymechanism the circuit will be closed through the magnet and the magnetenergized, as just stated.

Referring now to Fig. 7, the manner in which the apparatus is applied toan ordinary web printing and delivery mechanism will be explain ed.'lheparticular form of web printing and delivery mechanism which hasbeen selected for the purpose of illustration is substantially thatwhich is shown in the United States Letters Patent No. 325,197,heretofore granted to me. The apparatus is equally applicable, however,to any other form of web printing and delivery mechanism, as will bereadily understood from the following description.

It is to be understood that in the diagram given M represents theimpression-cylinders, N the form-cylinders, and "a the inking mechanismfor the main printing-machine.

0 represents the main web, 0 the slitter by which the main web isdivided, and Pthe webturners, by which the sections of the main web areassociated.

R represents the singledmpression cylinder, S the single-form cylinder,ands the inkin g mechanism of the su 'iplementprintin g machine.

T represents the supplement-web, which is of onehalf the width of themain web, and V the web-turners, by which the supplementweb istransferred laterally and turned over after it is printed on one side,so as to be represented to the same cylinders to be printed on its otherside.

\V represents the longitudinal folder, by which the two sections of themain web and the supplement-web, after being associated, are foldedlongitudinally, and X the cutting and folding cylinders, by whichtheassociated the lever 5, as before explained.

and longitudinally-folded webs are severed into sheets and the sheetsfolded transversely preparatory to being finally delivered from themachine.

Located at suitable points in the paths of the webs through the machinewhere the webs are most likely to become broken are a number ofcircuit-closers a, which consist of fixed contact-points 13, locatedupon one side of the web and just out of contact therewith, and lightspring contact-points 14, located upon the other side of the web andarranged to bear gently upon the web, so that as long as the web isunbroken the two contact-points of the circuit-closers are kept apart;but whenever the web becomes broken at any point where one of thesecircuit-closers is located the two contact-points will immediately cometogether and thus close the circuit at that point. These contact-points13 14 are connected by wires 19 with a suitable battery and with theelectro-magnet 23, as indicated in Fig. 7, so that Whenever the twopoints forming any one of the circuit-closers are permitted to cometogether a circuit will be closed through the magnet 23 and it will beenergized and rock The points indicated in the diagram for the locationof the circuit-closers a, are purely arbitrary, and have been selectedmerely for the purpose of illustration. The circuit-closers can belocated at any points, and there can be a greater or less number ofthem, according to the requirements of any particular machine to whichthe apparatus is applied.

Referring now again to Figs. 1 to 6, the operation of the automatic stopmechanism will be ex lained. In describing this operation it will firstbe assumed that the printingmechanism is operating in a perfect manner.So long as this continues the contact-points 13 14 of thewariouscircuit-closers a will bekept separated and no circuit will be completedthrough the magnet The pawls 9 will be held out of engagement with theratchet 22 I by the catches 8, and the lever 5 will remain in its normalposition, so as not to engage with the tail-pieces 7. The shaft 40 willbe driven by the printing mechanism, and the disk 33 and pawls 9 will becarried idly by it, and the belt-shifter G and the parts connectedtherewith will remain in the position shown in Figs. 1, 2, and 3. If atany time, however, either of the webs should break, the contact-pointsof the one of the circuit-closers a located at or next in advance of thepoint where the web breaks will at once or almost immediately afterwardcome together, thereby closing the circuit through the magnet 23, so asto energize the magnet. The magnet thus energized will, through itsarmature 12, rock the lever 5 and throw its lower end into the path ofthe tail-pieces 7, so that as soon as the first one of these tail-piecesarrives opposite the lever it will be rockedby the lever, so as todisengage the catch 8 and allow the pawl 9 of that catch to engage withthe ratchet 22, and this will cause the ratchet 22 and pinion 21 torevolve with the shaft 40,- and thus through the rack 19 move' the bar20 and shift the belt F from the fast pulley O to the loose pulleyD andremove the power from the machine, as shown in Fig. 4. As soon as thebelt F has been fully shifted onto the loose pulleyt-he belt-shifterwill be arrested by its head coming into contact with a pin or othersuitable stop 17, projecting from the bar H, as also shown in Fig. 4. Assoon as the belt-shifter is thus arrested it will overcome the frictionbetween the disk 33 and band 34 and permit the band to move around thedisk, and thus avoid danger of breaking the parts of the apparatus incase the printing mechanism should not come to rest by the time the belthas been entirely shifted onto the loose pulley.

As the printing mechanisms to which this invention is designed to beapplied are very heavy and are run at great speed, the parts necessarilyacquire a great momentum, so that the machine will continue to run for aconsiderable time after the belt has been shifted onto the loose pulleyunless resistance is offered. It is therefore desirable, in order tobring the machine to rest quickly in case of the breaking of the web, toprovide a brake mechanism which shall be automatically applied at thesame time the belt is shifted. For this purpose thebrake-pulley E isprovided with a brake-shoe 50, which is pivoted to the short arm of alever 49,'the long arm of which rests upon the upper edge of the bar ofthe belt-shifter. The bar 20 is so formed that when the belt-shifter isin its normal positionthat is to say, when the belt is on the fastpulley Cthe long arm of the lever 49 will be raised, so as to hold theshoe 50 out of contact with the brake-pulley, as indicated in Fig. 1.The bar 20 is, however, provided with an incline 18, which, as the baris moved outward to shift the belt onto the loose pulley,-

permits the long arm of the lever 49 to drop, so as to lower the shoe 50onto the pulley E, and the shoe 50 and the fulcrum of the lever 49 areso positioned with relation to each other and to the pulley E thatassoon as the shoe is applied to the pulley the further movement of thepulley tends to increase the pressure of the shoe and make the brakemore effective.

In order-to prevent the battery 0 from being consumed when the machineis not in operation, and when as a consequence the web is not threadedthrough the machine, so as to prevent the contact-points of the circuitclosers a from coming together, and also to permit the machine to beoperated slowly, as in starting up, it is desirable to provide means bywhich the clutch mechanism will only be operated to automatically stopthe machine 1 after the belt has been shifted fully onto the fast pulleyor after the machine has attained its full speed. For this purpose thecircuit in which the magnet 23 is located is provided with acircuit-breaker 62, consisting of two contact-points 27 28, formed ofspring-arms and located in such position that the two points will bebrought together, so as to close the circuit at that point only when thebar 20 is moved inward to its extreme position, as

shown in Figs. 2 and 3, so as to shift the belt fully onto the fastpulley. From this it will being operated slowly, the circuit throughthe.

magnet 23 will be broken, so that the clutch mechanism will not beoperated by the lever 5, and the circuit can only be completed when thebelt is fully shifted onto the fast pulley, so as to operate the machineat full speed.

\Vhenever the clutch mechanism has been operated to shift the belt andapply the brake, as has been explained, it is of course necessary beforeagain starting the machine to dis engage the pawl 9 from the ratchet 22and restore it to its normal position. To effect this the pin or stop 17is made removable from the bar H, and the bar is provided with a secondpin or stop 24:, located outward from the stop 17 a distance just equalto the distance between two of the teeth of the ratchet 22. hentherefore it is desired to disengage the pawl from the ratchet, it isonly necessary to remove the pin or stop 17 and move the bar 20 and thebelt-shifter outward, which can readily be done by grasping the handleagainst the stop 24. This will, through the rack 19, revolve the ratcheta distance equal to the length of one of its teeth, so as to bring thepawl 9 onto the crown of the tooth in the rear of one with which it isin engagement, and when it is in this position it will be caught by thecatch 8 and retained, so that the belt-shifter and the bar can then bemoved freely inward. The recesses 2 in the ends of the pawls 9 areinclined, as best shown in Fig. 6, so that as soon as the catches S arefairly entered into the recesses the tension of the springs 6 will forcethem farther in, and thus raise the pawls slightly away from the teethof the ratchet. It is also necessary, before commencing to shift thebelt back onto the fast pulley to start the machine, to raise the shoe50 away from the pulley E. The incline 18 cannot be depended upon forthis purpose, because it would not act to rock the lever 49 until afterthe belt had been shifted a considerable part of the required distance.The bar 20 is therefore provided upon its under side with a stud 26,

which as the bar is moved outward to shift the belt onto the loosepulley engages with a pivoted dog 25, depending from the under side ofthe lever 19, and rocks said dog to the position shown in Fig. 4.Whenever, therefore, the bar 20 and belt-shifter are moved inward, thestud 20 engages with the recess formed in the end of the dog and acts toraise the lever abruptly, so as to raise the shoe from the pulley E. Asthe bar 20 and the beltshifter are moved inward to their extremeposition the stud 26 is carried so far inward as to pass out of therecess in the end of the dog and permit the latter to rock back to itsnormal position, as shown in Fig. 3.

It is to be understood that the electrical connections, which are hereinillustrated as consisting of wires 1), may in practice be formed partlyby the frame and other parts of the machine.

Although the automatic stop mechanism is herein shown as applied to amachine in which the starting and stopping are effected by shifting thedriving-belt from a loose to a fast pulley, and vice versa, it can, bychanging the form of the connections, be applied equally well to thosemachines where the starting and stopping are effected by tightening andloosening the driving-belt, or by operating a friction or other clutch,and such an application of the stop mechanism is, in a broad sense,within the scope of the present invention.

What I claim is A portion of the mechanisms shown herein are made thesubjectanatter of my application filed December 5, 1888, No. 219,718.

1. The combination, with a web-printing machine and the devices forstarting and stopping the same, of connections, including a clutchmechanism, for operating the latter from the former, anelectro-magnetfor controlling the operation of said clutch mechanism,one or more circuit-closers located in the path of the web through themachine and arranged to be controlled by the web, and electricalconnections between said circuit closer or closers and saidelectro-magnet, all substantially as described.

2. The combination, with a web-printing machine, the mechanism foracting on its driving-belt to apply and remove the power, and the brakemechanism, of connections, including a clutch mechanism, for operatingthe latter mechanism from the former, an electromagnet for controllingthe operation of said clutch mechanism, one or more circuit-closerslocated in the path of the web through the machine and arranged to becontrolled by the web, and electrical connections between said circuitcloser or closers and said electro-magnet, all substantially asdescribed.

3. The combination, with a web-printing machine, of a belt-shifter forapplying and removing the power, and brake-connections, including aclutch mechanism, for operating the belt-shifter and applying the brakefrom the printing-machine, an electro-magnet for controlling theoperation of said clutch mechanism, one or more circuit-closers locatedin the path of the web through the machine and arranged to be controlledby the web, and electrical connections between said circuit closer orclosers and said eleetro-magnct, all substantially as described.

1. The combination, with a webprinting machine and the devices forstarting and stopping the machine, of the rack 19 and pinion 21, foroperating the starting and stopping mechanism, connections for operatingsaid pinion from the printing-machine, including a clutch mechanismconsisting of a ratchet and a pawl or pawls for making and breaking saidconnections, an electro-magnet for controlling said pawl or pawls, oneor more circuit-closers located in the path of the web through themachine and arranged. to be controlled by the web, and electricalconnections between said circuit closer or closers and saidelectro-magnet, all substantially as described.

5. The combination, with a web-printing machine and its belt-shifter andbrake, of the 6. The combination, with a web-printing machine and thedevices for starting and stopping the machine, of connections foroperating said devices from the printing-machine,

including a clutch mechanism for controlling said connections, and alsoincluding the disk 33 and friction-band 34, forming a yielding joint insaid connect-ions, an electro-magnet for controlling said clutchmechanism, one or more circuitclosers located in the path of the webthrough the machine and arranged to be controlled by the web, andelectrical connections between said circuit closer or closers and saidelectro-magnet, all substantially as described.

7. The combination, with a web-printing machine and the devices forstarting and stopping the same, of connections, including a clutchmechanism, for operating the latter from the former, an electro-magnetfor controlling the operation of said clutch mechanism, one or morecircuit-closers located in the path of the web through the machine andar- 8. The combination, with a web-printing machine and'its starting andstopping devices, of the rack 19 and pinion 21, for operating saiddevices, the disk 33, carrying a pawl or pawls 9 and driven throughyielding frictional connections from the printing-machine, the ratchet22, connected to the pinion 21 and arranged to be engaged by the pawl orpawls 9, the electro-inagnet 23, having the lever 5, for tripping saidpawl or pawls, one or more circuit-closers located in the path of theweb through the machine and arranged to be controlled by the Web, andelectrical connections between said circuit closer or closers and saidelectro-magnet, all substantially as described. 9. The combination, witha web-printing machine and its starting and stopping devices, of therack 19 and pinion 21, for operating said devices, the disk 33, carryinga pawl or pawls 9 and driven through yielding frictional connectionsfrom the printing-machine, the ratchet 22, connected to the pinion 21and arranged to be engaged by the pawl or pawls 9, the electro-magnet23, having the lever 5 for tripping said pawl or pawls, one or morecircuit-closers located in the path of the Web through the machineandarranged to be controlled by the web, electrical connections betweensaid circuit closer or closers and said ele'ctro-magnet, and acircuit-breaker d, controlled by the stopping and starting devices andarranged to break the circuit through the magnet when the devices areoperated to stop the machine, all substantially as described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

LUTHER C. CROWELL. Witnesses:

GEORGE H. Borrs, J. J. KENNEDY.

